{"data":{"schemaVersion":"realm.temporal-relationships.v1","temporalSemantics":{"validTime":{"granularity":"date","bounds":"inclusive","nullStart":"start date not published in the upstream history row","nullEnd":"open-ended in the upstream history row; not independent proof of present control"},"transactionTime":{"observedAt":"2026-10-13T11:19:05.459773+00:00","meaning":"time the checksum-addressed MDRS artifacts were observed by the PostgreSQL ingestion"},"derivation":{"controllerControlsOperator":"intersection of controller and operator valid-time intervals evidenced through this mine","currentIdentity":"current controller and operator are asserted only by the MDRS Mines snapshot"}},"current":{"mine":{"type":"mine","id":"4601266","name":"No 1"},"operator":{"type":"operator","id":"P19059","name":"Laurel Coal Corp"},"controller":{"type":"controller","id":"C06080","name":"Bell Douglas-Casset Bias"},"source":{"datasetId":"msha-mines","observedAt":"2026-10-13T11:19:05.459773+00:00"}},"edges":[{"type":"operator_operates_mine","subject":{"type":"operator","id":"P02313","name":"Armco Inc"},"object":{"type":"mine","id":"4601266","name":"No 1"},"validFrom":"1950-01-01","validTo":"1984-02-26","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601266|P02313|1950-01-01|1984-02-26"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C01978","name":"Armco Inc"},"object":{"type":"mine","id":"4601266","name":"No 1"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601266|C01978|1950-01-01|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C01978","name":"Armco Inc"},"object":{"type":"operator","id":"P02313","name":"Armco Inc"},"validFrom":"1950-01-01","validTo":"1984-02-26","current":false,"derived":true,"evidenceMineId":"4601266","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601266|P02313|1950-01-01|C01978|1950-01-01|56976"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C05313","name":"Hanson PLC"},"object":{"type":"mine","id":"4601266","name":"No 1"},"validFrom":"1950-01-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601266|C05313|1950-01-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P06396","name":"Peabody Coal Company"},"object":{"type":"mine","id":"4601266","name":"No 1"},"validFrom":"1984-02-27","validTo":"1989-03-21","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601266|P06396|1984-02-27|1989-03-21"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C05313","name":"Hanson PLC"},"object":{"type":"operator","id":"P06396","name":"Peabody Coal Company"},"validFrom":"1984-02-27","validTo":"1989-03-21","current":false,"derived":true,"evidenceMineId":"4601266","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601266|P06396|1984-02-27|C05313|1950-01-01|68277"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C06080","name":"Bell Douglas-Casset Bias Et Al"},"object":{"type":"mine","id":"4601266","name":"No 1"},"validFrom":"1987-10-01","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601266|C06080|1987-10-01|"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P20346","name":"Rose Eagle Coal Corp"},"object":{"type":"mine","id":"4601266","name":"No 1"},"validFrom":"1989-03-22","validTo":"1990-07-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601266|P20346|1989-03-22|1990-07-24"}},{"type":"controller_controls_mine","subject":{"type":"controller","id":"C13874","name":"Meade B J"},"object":{"type":"mine","id":"4601266","name":"No 1"},"validFrom":"1989-03-22","validTo":"1990-07-24","current":false,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601266|C13874|1989-03-22|1990-07-24"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C13874","name":"Meade B J"},"object":{"type":"operator","id":"P20346","name":"Rose Eagle Coal Corp"},"validFrom":"1989-03-22","validTo":"1990-07-24","current":false,"derived":true,"evidenceMineId":"4601266","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601266|P20346|1989-03-22|C13874|1989-03-22|91334"}},{"type":"operator_operates_mine","subject":{"type":"operator","id":"P19059","name":"Laurel Coal Corp"},"object":{"type":"mine","id":"4601266","name":"No 1"},"validFrom":"1990-07-25","validTo":null,"current":true,"derived":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601266|P19059|1990-07-25|"}},{"type":"controller_controls_operator","subject":{"type":"controller","id":"C06080","name":"Bell Douglas-Casset Bias Et Al"},"object":{"type":"operator","id":"P19059","name":"Laurel Coal Corp"},"validFrom":"1990-07-25","validTo":null,"current":true,"derived":true,"evidenceMineId":"4601266","intervalAnomaly":false,"source":{"datasetId":"msha-controller-operator-history","observedAt":"2026-10-13T11:19:05.459773+00:00","recordKey":"4601266|P19059|1990-07-25|C06080|1987-10-01|70706"}}],"coverage":{"historyRecords":4,"edgeCount":12,"intervalAnomalies":0,"sourceDatasetId":"msha-controller-operator-history"}},"meta":{"mineId":"4601266","dataSource":"postgres","snapshotId":"2026-10-13T11:19:05.459773+00:00","completedAt":"2026-10-13T11:26:59.401Z","sourceCount":20,"totalRows":17906804,"relationshipSemantics":"valid time; null validTo means current or open-ended in the source"}}